Ni(II), Cu(II), and Zn(II) complexes of tetradentate schiff base containing two thiadiazoles units: Structural, spectroscopic, magnetic properties, and molecular modeling studies
作者:Kerim Serbest、Hakan Kayi、Mustafa Er、Kemal Sancak、İsmail Değirmencioğlu
DOI:10.1002/hc.20496
日期:2008.11
support octahedral geometry around the Ni(II), Cu(II), and Zn(II) ions. The magnetic properties were investigated, and ferromagnetic coupling is observed in Cu(II) and Ni(II) complexes. In addition, total energy and heat of formation calculated for conformers of the Schiff base ligand by the semiempirical AM1 calculations have shown that E,Z-isomer of the ligand is more stable (about 5.3 kcal/mol) than
四个新的单核金属配合物与单核席夫碱配体含有两个噻二唑单元已被合成。配体和金属配合物通过元素分析、IR、1H 和 13C NMR、UV-vis、ESR、电喷雾电离质谱和磁化率测量进行表征。电子光谱、磁化率测量和分子建模研究支持 Ni(II)、Cu(II) 和 Zn(II) 离子周围的八面体几何形状。研究了磁性,并在 Cu(II) 和 Ni(II) 配合物中观察到铁磁耦合。此外,通过半经验 AM1 计算为 Schiff 碱配体的构象异构体计算的总能量和形成热表明,配体的 E,Z-异构体比 E,E-和 Z 更稳定(约 5.3 kcal/mol) ,Z-异构体。© 2008 Wiley Periodicals, Inc. 杂原子化学 19:700–712, 2008; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc